205146461 has 4 divisors (see below), whose sum is σ = 220926972. Its totient is φ = 189365952.

The previous prime is 205146457. The next prime is 205146509. The reversal of 205146461 is 164641502.

205146461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 164641502 = 2 ⋅82320751.

It can be written as a sum of positive squares in 2 ways, for example, as 11519236 + 193627225 = 3394^2 + 13915^2 .

It is a cyclic number.

It is not a de Polignac number, because 205146461 - 2² = 205146457 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205146061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7890236 + ... + 7890261.

It is an arithmetic number, because the mean of its divisors is an integer number (55231743).

Almost surely, 2^205146461 is an apocalyptic number.

It is an amenable number.

205146461 is a deficient number, since it is larger than the sum of its proper divisors (15780511).

205146461 is a wasteful number, since it uses less digits than its factorization.

205146461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15780510.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 205146461 is about 14322.9347900491. The cubic root of 205146461 is about 589.7772413877. Note that the first 3 decimals are identical.

Adding to 205146461 its reverse (164641502), we get a palindrome (369787963).

The spelling of 205146461 in words is "two hundred five million, one hundred forty-six thousand, four hundred sixty-one".